Sampson Corp. is evaluating the introduction of a new product. The possible levels of unit sales and the probabilities of their occurrence are shown next Sales in Units 70 100 120 150 Possible Market Reaction Low response Moderate response High response Very high response Probabilities 40 30 10 20 a. What is the expected value of unit sales for the new product? (Do not round intermediate calculations and round your answer to the nearest whole unit.) Expected value 100 units b. What is the standard deviation of unit sales? (Do not round intermediate calculations. Round your answer to 2 decimal places.) units Standard deviation